Nature`s Guise (T)
Changes a target friendly unit's appearance so that it blends in with the forest. It becomes invisible to enemy eyes and gains a 10% movement speed bonus, but it must remain near a tree, or the Guise is lost.
Level 1 - Lasts 15 seconds.
Level 2 - Lasts 30 seconds.
Level 3 - Lasts 45 seconds.
Level 4 - Lasts 60 seconds.
• Has an initial fade time of 2 seconds, during which the unit is still visible.
• If the unit has a distance of more than 375 to the closest tree during 1 second, the invisibility will be removed.
• Can be used on units even if they aren't close to a tree, but the invisibility will be removed almost instantly.
• Treant Protector can cast spells without losing invisibility from Nature's Guise.Mana Cost: 90/80/70/60Cooldown: 10/8/6/4 seconds

When playing in a 5v5 game, u wont have much money to start from so i suggest going for Potion & Scroll of TP as well as a couple of Bracers. Early game all u need is 2 bracers and Boots of speed and a perseverance(perseverance is important for the refresher orb build and spamming living armor). With ur armor,high Hp,and high damage it should be easy to deny and last hit (focus on denying cause ur a melee player). Denying makes the enemy doesn't get the exp and the gold from ur creep. take the side lines

Early hero killing: Put on ur Living Armor,Nature Guise, go to the back of your enemy, hit several times untill half health and the Overgrowth,hit again and kill!but sometimes the enemy run before he gets to half HP. Repeat the nature Guise trick.Only overgrowth if its get to half or les hp, if you hit him with his hp still full, he's only going to get away and a waste of your mana. Or you could do it the easy way,just ask ur partner to focus ur attack on the same enemy hero. Rooftrellen are best team up with skill area hero like SandKing, Rylai, etc. Just overgrowth and turn on your allies ulti. The later the game the stronger u are and your overgrowth. You can kill any hero as long as u have your allies with you. remember Teamwork plays an important part in playing Rooftrellen.

Mid Game 8-16

By now you should be saving for a sacred relic. You can do this by creeping or killing enemy hero. Just use the hero killing tactic and don't forget it's even better if you have an ally or more with you. Even if it's 5 on 2 situation you could manage a couple of kill if you and your ally have their ultimate. Example: Cast LA on you and your ally, Then cast NG on your ally and then you, Go near your enemies and unleash u and your ally ulties. if the enemy have sentry or game with them, don't worry. Just go straight at them and everyone cast ulti. there's a chance all the enemy could get killed.Best team up with skill areas.

Late Game 16-25

Now you should have an oblivion staff and perseverance, go build refresher orb for double overgrowth. This way you can get a triple kill all by your self. One thing to be remember when using refresher orb combo. First, you would need at least 1000+ mana beacause Overgrowth(300)+refresher(375)+overgrowth again(300)=975 mana. Dont get refresher untill at least lv 20 or i wont be much use because the lack of mana. If it gets really late, buy an aegis for suvivabilty.

Note :

If it's too hard to buy a radiance(the enemies own you), you can buy the usual damage increasing item such as Assault Cuirass. So focus on damage.

You have to remember when playing Rooftrellen your playing a support hero, although you can kill and push too. But your skill is mainly to support. Another thing to remember, TEAMWORK. Always let your ally know when your overgrowth is ready and ask them to join you for kill.

When enemies are entagled in overgowth, it can still attack or cast magic. This has happened to me several times. I overgrowth Pudge and he ate me with his "Hmm.. Fresh Meat", the same thing happened to shandelzare, she swap me for God sake! And she escape... But I dont know about blink though. Because usually the enemy is panicking while they are trapped in Overgrowth. Also watch out for linken spheres... They can negate the overgrowth

If u ever get gank, just turn on nature guise and hide or run. by maxing out stats plus living armor from the beginning makes you harder to kill.